Eldorado, Ontario Gold Mine:
Nothing much is left of Eldorado now, but in 1866 the story was quite different. When rumours of gold discoveries such as "gold the size of butternuts" began to surface, the town, not surprisingly, grew from nothing to some 80 buildings almost overnight. Prospectors and speculators arrived in droves to have their pickings of the anticipated riches.....
http://www.ghosttownpix.com/ontario/towns/eldorado.html